US20020096014A1 - Cam for composite camshaft - Google Patents
Cam for composite camshaft Download PDFInfo
- Publication number
- US20020096014A1 US20020096014A1 US09/578,417 US57841700A US2002096014A1 US 20020096014 A1 US20020096014 A1 US 20020096014A1 US 57841700 A US57841700 A US 57841700A US 2002096014 A1 US2002096014 A1 US 2002096014A1
- Authority
- US
- United States
- Prior art keywords
- core
- conical
- cam
- extents
- insertion section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/02—Camshafts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49293—Camshaft making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
Definitions
- the present invention concerns the design of a cam for a composite camshaft for controlling the valves in internal-combustion engine and featuring the characteristics recited in the preamble to claim 1 .
- Cams and camshaft of this genus are described in German 4 121 951 C2.
- the core of the shaft differs in thickness along its length, and, to facilitate sliding the cam over it, the cam is provided with a cavity that tapers out like a funnel at least part-way along at least one side.
- the outside diameter of the opening into the cavity is at least as long as the ridges or webs that constitute the thicker sections of the core.
- the conical expansion extends at least 1 ⁇ 5 of the thickness of the cam and has an apical angle of approximately 20 •.
- the object of the present invention is a cam with a bore that has a funnel-shaped core-insertion section ensuring that the cam will rest more securely against the core and remain more precisely centered.
- FIG. 1 is a perspective view of q composite camshaft
- FIG. 2 a view of a single cam
- FIG. 3 illustrates a cam and a core before the core has been forced onto it
- FIG. 4 illustrates the cam forced onto the core
- FIG. 5 is a section through the cam
- FIG. 6 is a larger-scale depiction of the detail VI in FIG. 5.
- the composite camshaft illustrated in FIGS. 1 through 4 comprises a core 1 that cams 2 can be forced onto.
- the shape of each cam 2 and its orientation in relation to core 1 will be dictated by the specifications of the particular internal-combustion engine.
- the core 1 of the illustrated embodiment is a hollow cylinder with corrugations 3 that constitute seats for cams 2 .
- Each cam 2 is provided with a bore 4 that is essentially narrower than corrugations 3 .
- the cam's core-insertion section 5 is funnel-shaped and at least as wide as corrugations 3 . Corrugations 3 are compressed when cams 2 are forced over them, resulting in a plastic but resilient deformation that ensures a tight fit between the cams and the core.
- Cams 2 are, at least in the vicinity of bore 4 , usually harder than core 1 .
- FIGS. 5 and 6 illustrate the core-insertion section 5 of a cam 2 in detail.
- Section 5 comprises two conical extents 6 and 7 of different length and apical angle.
- Apical semi-angle 8 is 2 •.
- the apical angle of outer conical extent 7 is 20 •, its semi-angle 9 accordingly equaling 10 •.
- the length 10 of outer conical extent 7 is 0.09 the thickness 11 of a cam 2 .
- core-insertion section 5 may comprise more than two mutually aligned conical extents. This feature can be particularly practical when cams 2 have a very considerable thickness 11 .
Abstract
Description
- The present invention concerns the design of a cam for a composite camshaft for controlling the valves in internal-combustion engine and featuring the characteristics recited in the preamble to claim1.
- Cams and camshaft of this genus are described in German 4 121 951 C2. The core of the shaft differs in thickness along its length, and, to facilitate sliding the cam over it, the cam is provided with a cavity that tapers out like a funnel at least part-way along at least one side. The outside diameter of the opening into the cavity is at least as long as the ridges or webs that constitute the thicker sections of the core. The conical expansion extends at least ⅕ of the thickness of the cam and has an apical angle of approximately 20 •.
- This design has drawbacks. First, in spite of the funnel-shaped expansion, considerable force is required to mount the cams. Furthermore, it is difficult to keep the cams precisely centered on the core.
- The object of the present invention is a cam with a bore that has a funnel-shaped core-insertion section ensuring that the cam will rest more securely against the core and remain more precisely centered.
- This object is attained in accordance with the present invention by the characteristics recited in the body of
claim 1. - Advantageous further and more advance embodiments are addressed in the subsidiary claims,2 through 8.
- One embodiment of the present invention will now be specified by way of example with reference to the accompanying drawing, wherein
- FIG. 1 is a perspective view of q composite camshaft,
- FIG. 2 a view of a single cam,
- FIG. 3 illustrates a cam and a core before the core has been forced onto it,
- FIG. 4 illustrates the cam forced onto the core,
- FIG. 5 is a section through the cam, and
- FIG. 6 is a larger-scale depiction of the detail VI in FIG. 5.
- The composite camshaft illustrated in FIGS. 1 through 4 comprises a
core 1 thatcams 2 can be forced onto. The shape of eachcam 2 and its orientation in relation tocore 1 will be dictated by the specifications of the particular internal-combustion engine. Thecore 1 of the illustrated embodiment is a hollow cylinder withcorrugations 3 that constitute seats forcams 2. Eachcam 2 is provided with abore 4 that is essentially narrower thancorrugations 3. The cam's core-insertion section 5 is funnel-shaped and at least as wide ascorrugations 3.Corrugations 3 are compressed whencams 2 are forced over them, resulting in a plastic but resilient deformation that ensures a tight fit between the cams and the core.Cams 2 are, at least in the vicinity ofbore 4, usually harder thancore 1. - FIGS. 5 and 6 illustrate the core-
insertion section 5 of acam 2 in detail.Section 5 comprises twoconical extents semi-angle 8 is 2 •. The apical angle of outerconical extent 7 is 20 •, itssemi-angle 9 accordingly equaling 10 •. - The
length 10 of outerconical extent 7 is 0.09 thethickness 11 of acam 2. - Depending on the specifications, core-
insertion section 5 may comprise more than two mutually aligned conical extents. This feature can be particularly practical whencams 2 have a veryconsiderable thickness 11.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19925028.6 | 1999-06-01 | ||
DE19925028 | 1999-06-01 | ||
DE19925028A DE19925028A1 (en) | 1999-06-01 | 1999-06-01 | Cam for composite camshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020096014A1 true US20020096014A1 (en) | 2002-07-25 |
US6502538B2 US6502538B2 (en) | 2003-01-07 |
Family
ID=7909846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/578,417 Expired - Lifetime US6502538B2 (en) | 1999-06-01 | 2000-05-25 | Cam for composite camshaft |
Country Status (5)
Country | Link |
---|---|
US (1) | US6502538B2 (en) |
EP (1) | EP1058033B1 (en) |
AT (1) | ATE265637T1 (en) |
DE (2) | DE19925028A1 (en) |
ES (1) | ES2215509T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005066522A1 (en) * | 2004-01-12 | 2005-07-21 | Buergler Robert | Arrangement and method for producing a camshaft |
CN103080485A (en) * | 2010-09-10 | 2013-05-01 | 泰森克鲁普普里斯塔技术中心股份公司 | Method for assembling an engine module |
US20150251238A1 (en) * | 2012-10-29 | 2015-09-10 | Thyssenkrupp Presta Teccenter Ag | Method for assembling an engine module |
CN105829763A (en) * | 2013-12-16 | 2016-08-03 | 舍弗勒技术股份两合公司 | Hydraulic tensioning device for a traction drive |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10027517A1 (en) * | 2000-06-06 | 2001-12-13 | Thyssen Krupp Automotive Ag | Shaft with hub with edge area of hub opening having profile formed by surface line of cone and merging into hub opening |
DE10216324A1 (en) * | 2002-04-13 | 2003-10-30 | Thyssen Krupp Automotive Ag | Composite functional shaft assembled from tube and component radially fitted on it has originally smaller diameter of tube before fitting of component constructed with widened regions with cylindrical or crowned generated surface |
EP1387102A1 (en) * | 2002-07-31 | 2004-02-04 | Robert Bürgler | Press-on shaft-hub connection |
ES2349396T3 (en) * | 2005-06-20 | 2010-12-30 | Thyssenkrupp Presta Teccenter Ag | CAMSHAFT COMPOSITE. |
DE102010021904A1 (en) * | 2010-05-29 | 2011-12-01 | Neumayer Tekfor Holding Gmbh | Method of manufacturing a camshaft and corresponding camshaft |
KR101901119B1 (en) | 2017-06-28 | 2018-09-27 | 주식회사이원정공 | Cam shaft for engine and cam piece of cam shaft for engine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1776615A (en) * | 1928-12-12 | 1930-09-23 | Aluminum Co Of America | Joint and method of making the same |
US2082379A (en) * | 1934-04-11 | 1937-06-01 | Gen Motors Corp | Press fitting |
CH670137A5 (en) * | 1985-03-06 | 1989-05-12 | Fischer Ag Georg | METHOD FOR PRODUCING A COMPOSITE CAMSHAFT. |
US4804290A (en) * | 1986-08-22 | 1989-02-14 | Peter J. Balsells | Latching and sealing device |
FR2605914B1 (en) * | 1986-11-03 | 1988-12-02 | Cegedur | FORCED JOINT ASSEMBLY OF A CIRCULAR METAL TUBE IN OVAL HOUSING |
DE69104016T3 (en) * | 1990-11-19 | 1999-09-02 | Nippon Piston Ring Co Ltd | Machine element with at least one connecting part fastened with pressure on a shaft. |
DE4121951C1 (en) * | 1991-07-03 | 1992-12-24 | Supervis Ets | |
DE19710847C2 (en) * | 1997-03-15 | 1999-01-07 | Selzer Fertigungstech | Composite control shaft and process for its manufacture |
-
1999
- 1999-06-01 DE DE19925028A patent/DE19925028A1/en not_active Withdrawn
-
2000
- 2000-03-25 EP EP00106499A patent/EP1058033B1/en not_active Expired - Lifetime
- 2000-03-25 AT AT00106499T patent/ATE265637T1/en active
- 2000-03-25 DE DE50006213T patent/DE50006213D1/en not_active Expired - Lifetime
- 2000-03-25 ES ES00106499T patent/ES2215509T3/en not_active Expired - Lifetime
- 2000-05-25 US US09/578,417 patent/US6502538B2/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005066522A1 (en) * | 2004-01-12 | 2005-07-21 | Buergler Robert | Arrangement and method for producing a camshaft |
US20070180694A1 (en) * | 2004-01-12 | 2007-08-09 | Robert Burgler | Arrangement and method for producing a camshaft |
US7721432B2 (en) | 2004-01-12 | 2010-05-25 | Robert Burgler | Arrangement and method for producing a camshaft |
CN103080485A (en) * | 2010-09-10 | 2013-05-01 | 泰森克鲁普普里斯塔技术中心股份公司 | Method for assembling an engine module |
US20130283613A1 (en) * | 2010-09-10 | 2013-10-31 | Thyssenkrupp Presta Teccenter Ag | Method for Assembling an Engine Module |
US10046425B2 (en) * | 2010-09-10 | 2018-08-14 | Thyssenkrupp Presta Teccenter Ag | Method for assembling an engine module |
US20150251238A1 (en) * | 2012-10-29 | 2015-09-10 | Thyssenkrupp Presta Teccenter Ag | Method for assembling an engine module |
US9981304B2 (en) * | 2012-10-29 | 2018-05-29 | Thyssenkrupp Presta Teccenter Ag | Method for assembling an engine module |
CN105829763A (en) * | 2013-12-16 | 2016-08-03 | 舍弗勒技术股份两合公司 | Hydraulic tensioning device for a traction drive |
US10253852B2 (en) * | 2013-12-16 | 2019-04-09 | Schaeffler Technologies AG & Co. KG | Hydraulic tensioning device for a traction mechanism drive |
Also Published As
Publication number | Publication date |
---|---|
US6502538B2 (en) | 2003-01-07 |
EP1058033A3 (en) | 2001-10-31 |
EP1058033A2 (en) | 2000-12-06 |
ES2215509T3 (en) | 2004-10-16 |
ATE265637T1 (en) | 2004-05-15 |
DE19925028A1 (en) | 2000-12-21 |
DE50006213D1 (en) | 2004-06-03 |
EP1058033B1 (en) | 2004-04-28 |
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Owner name: THYSSENKRUPP TECHNOLOGIES AG, GERMANY Free format text: MERGER;ASSIGNOR:THYSSENKRUPP AUTOMOTIVE AG;REEL/FRAME:020876/0395 Effective date: 20070116 Owner name: THYSSENKRUPP AUTOMOTIVE AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEUTHOLD, RUDOLF;REEL/FRAME:020876/0393 Effective date: 20000325 Owner name: THYSSENKRUPP PRESTA TECCENTER AG, LIECHTENSTEIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THYSSENKRUPP TECHNOLOGIES AG;REEL/FRAME:020876/0528 Effective date: 20080401 |
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